These "geniuses" show they aren't completely empty-minded, but, there is an easy way of proving them wrong. If you try adding 7 together 13 times using their method your answer would be 104. That proves that this method doesn't work. Another pair of numbers this does work for is 3 times 18. As shown in the videos, 6) 36 (15. 6 doesn't go into 3, but it goes into 6 once(that is where you get the 1 in 15). The 6 in 36 minus 6 is 0. You bring the 3 from 36 down it is 30. 6 goes into 30, 5 times(that's where the 5 in 15 comes from), so 36 divided by 6 is 15.